"Starting in January 2026, the rent adjustment coefficient will be 2.24%, applicable to existing lease agreements. This update is not mandatory. The landlord may choose not to apply the increase or select any month in 2026 to update the rent amount, provided they notify the tenant 30 days in advance," explains the consumer protection organization.

Rents not updated in the last three years may increase by more than 11%

DECO PROteste explains that "landlords who have not updated rent in the last three years may apply the accumulated coefficients from those years, which may result in an increase of more than 11 percent."